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Finding the Fourth Proportional to 389.63, 536.93 and 351.88

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Solution

The fourth proportional to 389.63, 536.93 and 351.88 is: 484.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.63 : 536.93 = 351.88 : x
  2. Step 2: Convert to fraction form
    389.63/536.93 = 351.88/x
  3. Step 3: Cross multiply
    389.63x = 536.93 × 351.88
  4. Step 4: Simplify right side
    389.63x = 188,933.15
  5. Step 5: Solve for x
    x = 188,933.15/389.63
  6. Step 6: Final answer
    x = 484.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.